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style: Remove old CSS scroll snap implementation.

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This will save us some time from figuring out what's the best thing to do in
bug 1552587, so that other patches I have in flight (mainly bug 1552708) can
land, since we cannot add a single byte to nsStyleDisplay right now otherwise.

The code removed here is well isolated and not that complicated, so it seems to
me that should be easy to bring back should we have an emergency (and I commit
to doing that while preserving the nsStyleDisplay size limit if we need to :)).

Differential Revision: https://phabricator.services.mozilla.com/D32026
This commit is contained in:
Emilio Cobos Álvarez 2019-05-21 22:51:54 +00:00
parent 44926adde7
commit 8bf0f82ddc
9 changed files with 2 additions and 192 deletions
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21
components/style/values/specified/gecko.rs
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@ -7,33 +7,12 @@
use crate::parser::{Parse, ParserContext};
use crate::values::computed::length::CSSPixelLength;
use crate::values::computed::{self, LengthPercentage};
use crate::values::generics::gecko::ScrollSnapPoint as GenericScrollSnapPoint;
use crate::values::generics::rect::Rect;
use crate::values::specified::length::LengthPercentage as SpecifiedLengthPercentage;
use cssparser::{Parser, Token};
use std::fmt;
use style_traits::values::SequenceWriter;
use style_traits::{CssWriter, ParseError, StyleParseErrorKind, ToCss};
/// A specified type for scroll snap points.
pub type ScrollSnapPoint = GenericScrollSnapPoint<SpecifiedLengthPercentage>;
impl Parse for ScrollSnapPoint {
fn parse<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
) -> Result<Self, ParseError<'i>> {
if input.try(|i| i.expect_ident_matching("none")).is_ok() {
return Ok(GenericScrollSnapPoint::None);
}
input.expect_function_matching("repeat")?;
// FIXME(emilio): This won't clamp properly when animating.
let length = input
.parse_nested_block(|i| SpecifiedLengthPercentage::parse_non_negative(context, i))?;
Ok(GenericScrollSnapPoint::Repeat(length))
}
}
fn parse_pixel_or_percent<'i, 't>(
_context: &ParserContext,
input: &mut Parser<'i, 't>,